Mould and Indoor Air Quality in Abu Dhabi

The position in Abu Dhabi is defined by what is not there. The Abu Dhabi Public Health Centre's index of Codes of Practice was read in full, and no Code of Practice covers mould, fungal contamination, biological agents in buildings, indoor air quality or building ventilation hygiene. The single Abu Dhabi document that sets exposure values is recorded by that same authority as suspended, and it contains no fungal or bioaerosol value in any case. That is an unusual thing to have to write, and it is considerably more useful to a building owner than a vague assurance would be. This page sets out the verified position and what competent practice looks like when there is no local number to test against.

No Code of Practice covers this subject

The Abu Dhabi Public Health Centre publishes an index of Codes of Practice covering named occupational safety and health subjects. That index was read line by line. No Code of Practice covers mould, fungal contamination, biological agents in buildings, indoor air quality, or building ventilation hygiene.

The nearest entries by subject matter are Code of Practice 5.0 on occupational health screening and medical surveillance, Code of Practice 12.0 on the prevention and control of Legionnaires' disease, Code of Practice 27.0 on confined spaces, and Code of Practice 52.0 on local exhaust ventilation. None of them addresses the subject of this site. Legionella control under Code of Practice 12.0, and occupational hygiene subjects such as local exhaust ventilation under Code of Practice 52.0, are distinct disciplines with their own methods and are not covered here.

This is a negative finding, and it is stated as one. It records what a published index does and does not contain, read directly rather than through a secondary summary. It is not a claim that no unpublished material exists anywhere. It is the answer that the authority's own index gives to the question, and it is the answer a building owner is entitled to have stated plainly rather than left as an implication.

The suspended exposure document

The one Abu Dhabi document that sets exposure values is the Occupational Standards and Guideline Values, Version 3.0, dated 2016. The Abu Dhabi Public Health Centre's own page for it carries this statement verbatim: "This document is currently suspended. Entities are to comply with relevant local or federal standards in force."

Setting the suspension aside entirely, it would still not supply a number for this subject. Its schedule of exposure values is a chemical-agent table derived from the threshold limit values published by the American Conference of Governmental Industrial Hygienists. It contains no fungal value and no bioaerosol value at all.

There are therefore two independent reasons why the document cannot be cited as the Abu Dhabi benchmark for a fungal result: its status, and its contents. A report that cites it for that purpose is wrong on both counts, and the error is worth catching, because a citation of an official-looking local document is exactly the thing a recipient is least likely to check.

The framework and the competent authority

The occupational safety and health framework in the emirate is the Abu Dhabi Occupational Safety and Health System Framework, known as ADOSH-SF, which was renamed from its predecessor. The competent authority is the Abu Dhabi Public Health Centre, referred to as ADPHC.

The renaming is a useful currency test in its own right. A report, a specification or a consultant's method statement that still refers to the framework by its former acronym is working from material that has not been checked since the change, which is a reasonable prompt to check everything else it cites. Codes of Practice published under the framework address named occupational safety and health subjects; the subject of this site is not among them.

What the absence of a local value does and does not mean

It does not mean that growth in an Abu Dhabi building is acceptable, or that nothing useful can be established about it. A threshold is a comparison device. It is not the reason to act, and the decisions that matter in a mould project do not depend on one. Visible growth is removed because it is present. The water that produced it is corrected because otherwise it will produce it again. Neither of those decisions needs a number, and neither becomes better founded when a number is available.

What the absence removes is the ability to declare a pass or a fail against a local figure. A report that announces a building in Abu Dhabi as compliant has to answer the question compliant with what, and the honest answer cannot be an Abu Dhabi value, because none exists.

It also removes a shortcut that is regularly abused: sampling first, comparing the result against a borrowed figure, and treating the comparison as though it had settled the matter. Where there is no local figure to borrow, the weakness of that approach is simply more visible than it is elsewhere. It was never sound anywhere.

Designing an assessment when there is no number to test against

The first discipline is that the comparison basis is defined in writing before any sample is taken, and not selected afterwards to suit the result that came back. A basis chosen after the fact is not a basis, and a reader has no way of knowing how many alternatives were considered and discarded.

The workable structure is comparative rather than absolute, and it does not need a limit to function. A simultaneous outdoor sample provides the reference, since outdoor air is the source of most of what is found indoors. One or more unaffected indoor areas provide controls within the same building and the same air handling arrangement. The suspect area is measured under stated conditions. The question the structure answers is whether an indoor source is amplifying, and that question has an answer whether or not any threshold exists.

Within that structure the genus profile carries more information than the total count. An indoor population dominated by genera that are scarce in the simultaneous outdoor sample points to an indoor source. An indoor population that mirrors the outdoor profile at a similar or lower concentration generally does not, however large the raw number looks in isolation.

Where a numeric reference is quoted at all, it is named for exactly what it is. The Dubai Municipality figures belong to a voluntary scheme in another emirate, and international documents are recognised practice rather than local duty. Either may be used as a declared reference point in Abu Dhabi provided it is described that way, and neither may be presented as an Abu Dhabi requirement.

Writing a defensible report without a benchmark

A report written in these conditions has to carry its own justification, because it cannot lean on a threshold to do the work. It states what was asked, what was done, what was found, and what each conclusion rests on.

It records the comparison basis and where that basis came from. It records the conditions under which sampling took place — the operating state of the building, the air conditioning setting, the outdoor conditions, the occupancy and the activity during the sampling period — because a spore count without those is not interpretable by anyone, including the person who took it.

It separates observation from inference and says where the inference stops. It does not convert a count into a statement about anyone's health, because that conversion is not available from the measurement. Where a question could not be answered, it says so and explains what would be needed to answer it.

In an emirate with no reference value, the least trustworthy report is the one that reads as though a standard had been applied. Confident language in the absence of a standard is a signal to look harder at the method, not a sign of rigour.

What can be asked for, and by whom

With nothing published locally on the subject, requests in Abu Dhabi arrive through contracts and client specifications rather than from an authority: a landlord, a developer, a facilities management scope, an insurer's loss adjuster after a water escape, or an employer responding to occupant complaints about a workplace.

Because there is no local threshold to point at, the specification has to do the work itself. A scope that asks for mould testing and stops there has left the most important decisions to whoever holds the sampling pump. A scope worth writing names the method, the comparison basis, the number and location of samples, the conditions under which they are taken, and what will count as an acceptable outcome — all before anyone attends site.

One request cannot be satisfied in the way it is usually meant. No licensing or approval scheme specifically for mould remediation contractors was identified in any emirate, so an instruction to appoint an approved mould remediation contractor cannot be discharged by consulting a register. Competence has to be evidenced directly, through the method statement, the containment and filtration arrangements, the experience of the people carrying out the work, and independent verification of the completed result by a party with no financial interest in it.

Codes of Practice

The full ADPHC Codes of Practice index was read line by line. No Code of Practice covers mould, fungal contamination, biological agents in buildings, indoor air quality or building ventilation hygiene.

The nearest entries

Code of Practice 5.0 on occupational health screening and medical surveillance, 12.0 on Legionnaires' disease, 27.0 on confined spaces and 52.0 on local exhaust ventilation. None addresses this subject.

Status of the exposure document

ADPHC's page for the Occupational Standards and Guideline Values states: "This document is currently suspended. Entities are to comply with relevant local or federal standards in force."

Contents of the exposure document

Version 3.0, dated 2016. Its schedule is a chemical-agent table derived from ACGIH threshold limit values. It contains no fungal value and no bioaerosol value at all.

Framework and authority

The framework is ADOSH-SF, renamed from its predecessor, and the competent authority is the Abu Dhabi Public Health Centre. Material still using the former acronym has not been checked since the change.

Remediation contractors

No licensing or approval scheme specifically for mould remediation contractors was identified in any emirate, so competence has to be evidenced directly rather than looked up on a register.

What an Abu Dhabi result can be compared against

No Code of Practice published by the Abu Dhabi Public Health Centre covers mould, fungal contamination, biological agents in buildings, indoor air quality or building ventilation hygiene. The Occupational Standards and Guideline Values (Version 3.0, 2016) is recorded by ADPHC as suspended, with the statement "This document is currently suspended. Entities are to comply with relevant local or federal standards in force.", and its schedule is a chemical-agent table containing no fungal or bioaerosol value. There is accordingly no Abu Dhabi figure against which a fungal result can be declared a pass or a fail.

Assessment in these conditions is comparative by design: a simultaneous outdoor reference, unaffected indoor controls, stated sampling conditions and a comparison basis fixed in writing before sampling. Any numeric reference quoted has to be named for what it is, and neither a Dubai scheme figure nor an international document creates an Abu Dhabi requirement.

Is there an Abu Dhabi limit for mould in buildings?

No. No Code of Practice in the ADPHC index covers mould, biological agents in buildings or indoor air quality, and the emirate's exposure values document is recorded as suspended and contains no fungal or bioaerosol value in any case.

Can the Abu Dhabi Occupational Standards and Guideline Values be used for a fungal result?

No, for two independent reasons. ADPHC's own page states that the document is currently suspended and that entities are to comply with relevant local or federal standards in force. And its schedule is a chemical-agent table that contains no fungal or bioaerosol value.

Does the Dubai Municipality figure apply in Abu Dhabi?

It is a figure inside a voluntary Dubai Municipality scheme. It can be quoted in Abu Dhabi as a declared reference point provided it is described that way, but it is not an Abu Dhabi requirement and should never be presented as one.

If there is no limit, how is a result interpreted?

Comparatively. A simultaneous outdoor sample provides the reference, unaffected indoor areas provide controls, and the question is whether an indoor source is amplifying. The genus profile relative to outdoors is usually more informative than the total count.

Does the absence of a limit mean nothing needs to be done about growth?

No. A threshold is a comparison device, not the reason to act. Visible growth is removed because it is present, and the moisture that produced it is corrected because otherwise it returns. Neither decision depends on a number.

Is there an approved list of mould remediation contractors in Abu Dhabi?

No licensing or approval scheme specifically for mould remediation contractors was identified in any emirate. Competence has to be evidenced through method, containment and filtration arrangements, the people doing the work, and independent verification of the finished result.